Birds of Extremadura - - Javier Prieta - Very useful, with frequent updates and a monthly review. Essential reading for the Extremadura Birder
ExtremaduraBirding - William's blog
Diario de un Enfoque - Juan Pablo's blog in Spanish
Birdingextremadura - Martin Kelsey's blog on the birds, natural history and life in general in Extremadura
Naturalqueva - Alfonso Perdel. Lots of fantastic bird photos and video